EP2053345A1 - Measuring device for heavy workpieces and receiver for such a measuring device - Google Patents
Measuring device for heavy workpieces and receiver for such a measuring device Download PDFInfo
- Publication number
- EP2053345A1 EP2053345A1 EP07119171A EP07119171A EP2053345A1 EP 2053345 A1 EP2053345 A1 EP 2053345A1 EP 07119171 A EP07119171 A EP 07119171A EP 07119171 A EP07119171 A EP 07119171A EP 2053345 A1 EP2053345 A1 EP 2053345A1
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- EP
- European Patent Office
- Prior art keywords
- turntable
- measuring device
- workpiece
- base plate
- shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0002—Arrangements for supporting, fixing or guiding the measuring instrument or the object to be measured
- G01B5/0004—Supports
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/0011—Arrangements for eliminating or compensation of measuring errors due to temperature or weight
- G01B5/0016—Arrangements for eliminating or compensation of measuring errors due to temperature or weight due to weight
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/20—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures
- G01B5/202—Measuring arrangements characterised by the use of mechanical techniques for measuring contours or curvatures of gears
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49998—Work holding
Definitions
- the invention relates to a measuring device for measuring heavy workpieces and a workpiece holder for use in such a measuring device.
- measuring devices to use measuring probes to measure the geometry, properties and other aspects of workpieces. Such measuring devices are often used for measuring gears and similar workpieces.
- the measuring device In order to be able to reach arbitrary points in three-dimensional space with the probe, the measuring device should have three or more numerically (CNC) controlled axes.
- CNC numerically
- a portal measuring device which has a movable in all three spatial directions of a Cartesian coordinate system probe.
- the object to be measured rests on a table that sits on a foundation or pedestal by means of several special feet.
- the probe is moved by means of a portal-shaped frame over the object and along the table. By vertically lowering the probe, the object can be scanned from above.
- the cited patent offers a solution which allows the weight influence on the position and measurement accuracy to be reduced.
- the device should be low in production and still be able to measure with high accuracy.
- a measuring apparatus for measuring a workpiece having a turntable for receiving the workpiece, a base plate having a turntable bearing, and a foundation on which the base plate rests.
- the turntable comprises a vertical shaft which is located below the turntable and which is mounted in the base plate by means of the turntable support.
- the turntable bearing comprises a thrust bearing. A lower end of the shaft spaced from the turntable is rotatably supported on the thrust bearing so that the weight of the workpiece, when received on the turntable, is introduced into the foundation through the turntable, the shaft and the thrust bearing.
- a corresponding workpiece holder for installation in a measuring device wherein the workpiece holder is characterized by the characterizing features of the corresponding main claim.
- measuring is used to describe the measurement or determination of the geometry, position or other aspects of a workpiece. This term is intended to broadly encompass any manner of sensing measurements by means of a scanning, scanning or scanning head, which may be e.g. can act mechanically, optically, capacitively and / or inductively operating push-button.
- Fig. 1 the essential elements of a previously known measuring device 100 explained. A part of these elements can also be used in the device 100 according to the invention.
- the measuring device 100 comprises a machine bed, which is referred to below more generally as the base plate 3.
- the base plate 3 is a kind of carrier element or frame (eg in the form of a casting) which carries the essential parts of the measuring device 100.
- a vertical measuring tower 16 may be provided with a probe 14 (but it can also be provided two probes 14).
- the measuring tower 16 may be moved in Y 'direction along the base plate 3 so as to reduce the distance to a workpiece 2 to be measured.
- the probe 14 (in Fig. 1 If this probe 14 is shown in 2 positions), it can also be individually delivered by extending or retracting parallel to the Y direction (which is parallel to the Y 'direction).
- the workpiece 2 in the example shown, a cylindrical wheel with shaft is perpendicular to a rotatable table, called turntable 1, stored.
- a lower mandrel D1 and an upper mandrel D2 also called counter tip
- It may be provided a corresponding lateral arm 21 to allow the clamping of the workpiece 2.
- the distance between the mandrels D1 and D2 can be adjusted.
- the base plate 3 together with all structures rests with several feet 22 on a foundation 12th
- FIG. 2 is now shown in a highly schematic representation of a first embodiment of the invention.
- a simplified sectional view through a novel base plate 3, which has a vertical passage opening 17, can be seen.
- This passage opening 17 extends from the top 3.1 to the bottom 3.2 of the base plate 3.
- it is a rotationally symmetrical through hole 17 (rotationally symmetrical with respect to the axis of rotation A).
- Inserted in this passage opening 17 is a turntable 1 (also referred to as a turntable) with a substructure which will be described below.
- the substructure comprises a shaft W, which is attached to the turntable 1 or a integral part of the turntable 1 is. This shaft W is held in the radial direction by a radial bearing 5.
- the shaft W passes centrally through the radial bearing 5 therethrough.
- the lower end face 13 of the shaft W is seated on a thrust bearing 9 or opens into a thrust bearing 9.
- This thrust bearing 9 is dimensioned and arranged so that acting in the axial direction forces (eg, the weight G of the workpiece 2) are received by the thrust bearing 9.
- the thrust bearing 9 is supported accordingly with respect to the foundation 12.
- This support is according to the invention so that either the total weight (this is at the in Fig. 2 the embodiment shown) or a large part of the weight (this is in the in Fig. 3 shown embodiment of the case) is introduced into the foundation 12.
- Seen in the vertical direction (ie parallel to the axis of rotation A) the turntable 1 can be easily displaced or displaced together with the shaft W. That is, the shaft W of the turntable 1 is mounted vertically floating freely.
- the base plate 3 for example, with corresponding feet 22 or blocks on the foundation 12 rest, such as in Fig. 4 shown.
- a heavy workpiece 2 is clamped onto the turntable 1 (eg between two mandrels D1 and D2, as in FIG Fig. 1 and Fig. 4 shown), so almost the entire weight G of the workpiece 2 is passed from the turntable 1 via the shaft W and the thrust bearing 9 in the foundation 12. Due to the floating bearing does not lead to a bending / deformation or other influence on the base plate 3. That is There is also no misalignment or other influence on the very sensitive 3-D measuring setup (eg the measuring tower 16 with a measuring probe 14 or with two measuring probes).
- FIG. 3 A presently preferred embodiment of the invention is in Fig. 3 shown.
- the turntable 1 is suspended with substructure.
- This floating storage is achieved by providing a corresponding flexible support 18.
- This flexible mounting 18 is designed so that turntable 1 is completely supported by the base plate 3 or held in this substructure. Now, if a large weight G placed or clamped on the turntable 1, so allows the flexible storage 18 a slight sagging or Nachuntenverschieben the shaft W together with the thrust bearing 13 located at the end of its axial bearing. 9
- a turntable 1 is provided as in Fig. 2
- a shaft W which is attached to the turntable 1 or an integral part of the turntable 1 is.
- This shaft W is held in the radial direction by a radial bearing 5.
- the shaft W passes centrally through the radial bearing 5 therethrough.
- the lower end face 13 of the shaft W is seated on a thrust bearing 9 or opens into a thrust bearing 9.
- This thrust bearing 9 is dimensioned and arranged so that acting in the axial direction forces (eg, the weight G of the workpiece 2) are received by the thrust bearing 9.
- the thrust bearing 9 is received in accordance with a (receiving) flange 10.
- the flange 10 in turn is supported on the foundation 12 or on a so-called foundation shoe 11, as in Fig. 3 shown.
- the flange 11 directly transfers the weight forces to the foundation 12 and in the second case the weight forces are transferred indirectly via the foundation shoe 11 to the foundation 12.
- the flange 10 is designed so that it serves as a flexible support 18. There is some flexibility in the axial direction. This flexibility results in the embodiment shown by the thin and flexible (membranous) webs 18.1.
- this type of flexible storage 18, which is also referred to herein as floating storage it is ensured that a large part of the weight forces G are introduced directly or indirectly into the foundation 12. Only a negligible proportion of the weight G is introduced via the webs 18. 1 into the lower region of the base plate 3. However, these forces are so small that it does not lead to a bending or other influence on the base plate 3 or the 3-D measurement setup (measuring device 100).
- a motor 6 is provided to rotate the turntable 1 together with the workpiece 2 about the rotation axis A.
- it is a servo motor which is arranged concentrically on the shaft W or in a receiving flange of the radial bearing 5.
- an angle measuring system 7, 8 for controlling the corresponding CNC control of the measuring device 100 and for accurate position detection can be used.
- this angle measuring system 7, 8 is located directly on or below the turntable 1.
- the angle measuring system 7, 8 may include, for example, an optical sensor 7 which is fixed to the base plate 3. Opposite the sensor 7 are located on the turntable 1 optically scannable markers 8. When the turntable 1 is rotated, the sensor 7 detects this rotation.
- the thrust bearing 9 is screwed by means of a screw connection (from a screw 19 with a threaded hole) to the lower end face 13 of the shaft W.
- the screw 19 is fixed in a screw hole / threaded hole in the lower end portion 4 of the shaft W.
- the foot shoe mentioned 11 can sit on or below the base plate 3 and rests flat on the foundation 12th
- An inventive workpiece holder 20 for installation in a measuring device 100 for example, a measuring device 100 according to Fig. 4 , includes at least one turntable 1 with a vertical shaft W, which is located in the installed state of the workpiece holder 20 below the turntable 1.
- the turntable 1 has a radial bearing 5, through which the shaft W passes centrally (in the middle).
- the turntable 1 comprises a thrust bearing 9, which is arranged at the front end below a lower front end 13 of the shaft W which is spaced from the turntable 1.
- the radial bearing 5 is designed for installation in an upper region of a vertical through-hole 17 and the axial bearing 9 for installation in a lower end region of the vertical through-hole 17.
- the through hole 17 is provided in the machine bed (base plate 3) of the measuring apparatus 100.
- the thrust bearing 9 is seated in the lower end region of the vertical through-hole 17 in such a way that the weight G is guided into a foundation 12 below the workpiece receptacle 20 when the weight G of the workpiece 2 is subjected to a vertical weight load.
- Fig. 4 is a schematic representation of an inventive measuring device 100 with a workpiece holder 20 after Fig. 2 , It may, for example, be a fully automatic CNC-controlled gear measuring center 100.
- the illustrated measuring device 100 is similar to the device 100 already described in connection with FIG Fig. 1 has been described. In the following, therefore, only the essential details of this embodiment will be described.
- FIG. 4 shown representation is a schematic representation in which a part of the elements are shown in a partial section.
- the workpiece holder 20 that is, the turntable 1 with the substructure of shaft W, radial bearing 5 and thrust bearing 9, in a through hole 17 of the base plate 3, and the machine bed.
- the base plate 3 rests on several feet 22 or blocks.
- the thrust bearing 9 supports directly (as in Fig. 4 shown) or indirectly (see, eg Fig. 3 ) on the foundation 12.
- Measuring centers 100 are particularly suitable for testing large and heavy spur gears as well as, worms and worm wheels, bevel gears and general dimensional, shape and position deviations on rotationally symmetrical workpieces and also for rotor measurement.
- the device 100 according to the invention has the advantage that, when measuring a large-modulus gear, no great effort is required in the preliminary setup (clamping) or in correcting or compensating for measuring inaccuracies that would result in conventional measuring devices when measuring heavy workpieces. During this time, an expensive measuring device would stand still, which is disadvantageous from a financial point of view.
- the workpiece holder 20 is particularly stable and designed with large reserves.
- the permissible test weight can be well over 1000 kg.
- even workpiece weights G of several tons e.g., more than 10 tons can be measured.
Abstract
Description
Die Erfindung betrifft eine Messvorrichtung für das Vermessen schwerer Werkstücke und eine Werkstückaufnahme zur Verwendung in einer solchen Messvorrichtung.The invention relates to a measuring device for measuring heavy workpieces and a workpiece holder for use in such a measuring device.
Es gibt Messvorrichtungen, um mittels Messtastern die Geometrie, Eigenschaften und andere Aspekte von Werkstücken zu (ver-)messen. Derartige Messvorrichtungen werden häufig zum Messen von Zahnrädern und ähnlichen Werkstücken eingesetzt.There are measuring devices to use measuring probes to measure the geometry, properties and other aspects of workpieces. Such measuring devices are often used for measuring gears and similar workpieces.
Bei derartigen Messvorrichtungen kommt es darauf an, eine hohe Messgenauigkeit zu garantieren. Entsprechend wird ein grosser Aufwand betrieben, um alle wesentlichen Komponenten solcher Messvorrichtungen so auszulegen, dass die Messfehler gering sind.In such measuring devices, it is important to guarantee a high accuracy of measurement. Accordingly, a great deal of effort is made to interpret all the essential components of such measuring devices so that the measurement errors are low.
Um beliebige Punkte im dreidimensionalen Raum mit dem Messtaster erreichen zu können, sollte die Messvorrichtung drei oder mehr numerisch (CNC) angesteuerte Achsen aufweisen.In order to be able to reach arbitrary points in three-dimensional space with the probe, the measuring device should have three or more numerically (CNC) controlled axes.
Speziell bei großen, sperrigen und sehr schweren Werkstücken ergeben sich verschiedene Probleme, die es nicht erlauben vorhandene Messvorrichtungen, wie zum Beispiel die in
Aus der deutschen Patentschrift
Es ist aber ein Nachteil dieser Anordnung, dass durch die lichte Höhe des portalförmigen Rahmens gleichzeitig auch die maximale Höhe und durch die lichte Breite auch die Breite des zu messenden Objekts begrenzt sind. Außerdem gibt es zahlreiche Werkstücke, die sich aufgrund ihrer Geometrie nicht oder nur begrenzt auf einem solchen Portalmessgerät in horizontaler Lage messen lassen. Außerdem hat das beschriebene Portalmessgerät den Nachteil, dass die vertikale Verstellbarkeit, die als ein wesentliches Merkmal propagiert wird, bei Werkstücken mit großem Gewicht nicht mehr oder nur noch eingeschränkt funktioniert.However, it is a disadvantage of this arrangement that are limited by the clear height of the portal-shaped frame at the same time the maximum height and the clear width and the width of the object to be measured. In addition, there are numerous workpieces that can not measure due to their geometry or limited to such a gantry gauge in a horizontal position. In addition, the portal measuring device described has the disadvantage that the vertical adjustability, which is propagated as an essential feature, no longer or only works to a limited extent for workpieces of great weight.
Es wird als ein weiterer Nachteil dieser Lösung angesehen, dass der Verfahraufwand bzw. Verfahrweg des Messtasters relativ gross und damit die Messdauer lang ist, wenn rotationssymmetrische Werkstücke (wie z.B. Zahnräder) zu vermessen sind.It is considered as a further disadvantage of this solution that the travel time or travel of the probe is relatively large and thus the measurement time is long when rotationally symmetrical workpieces (such as gears) are to be measured.
Es ist daher eine Aufgabe der Erfindung, eine Messvorrichtung und eine neuartige Werkstückaufnahme bereit zu stellen, die es ermöglichen grosse und vor allem schwere Werkstücke schnell und zuverlässig zu messen, ohne dass das Gewicht des Werkstücks einen negativen Einfluss auf die Messgenauigkeit hat.It is therefore an object of the invention to provide a measuring device and a novel workpiece holder, which allow large and especially to measure heavy workpieces quickly and reliably, without the weight of the workpiece having a negative influence on the measuring accuracy.
Ausserdem soll die Vorrichtung günstig in der Herstellung sein und trotzdem hochgenau messen können.In addition, the device should be low in production and still be able to measure with high accuracy.
Entsprechend wird gemäß Erfindung eine Messvorrichtung zum Messen eines Werkstücks bereit gestellt, die einen Drehtisch zum Aufnehmen des Werkstücks, eine Grundplatte mit einer Drehtischlagerung und ein Fundament aufweist, auf dem die Grundplatte ruht. Gemäß Erfindung umfasst der Drehtisch eine vertikale Welle, die sich unterhalb des Drehtischs befindet und die mittels der Drehtischlagerung in der Grundplatte gelagert ist. Die Drehtischlagerung umfasst ein Axiallager. Ein von dem Drehtisch beabstandetes unteres Stirnende der Welle ist so auf dem Axiallager drehbar gelagert, dass das Gewicht des Werkstücks, wenn es auf dem Drehtisch aufgenommen ist, durch den Drehtisch, die Welle und das Axiallager hindurch in das Fundament eingeleitet wird.Accordingly, according to the present invention, there is provided a measuring apparatus for measuring a workpiece having a turntable for receiving the workpiece, a base plate having a turntable bearing, and a foundation on which the base plate rests. According to the invention, the turntable comprises a vertical shaft which is located below the turntable and which is mounted in the base plate by means of the turntable support. The turntable bearing comprises a thrust bearing. A lower end of the shaft spaced from the turntable is rotatably supported on the thrust bearing so that the weight of the workpiece, when received on the turntable, is introduced into the foundation through the turntable, the shaft and the thrust bearing.
Außerdem wird gemäß Erfindung eine entsprechende Werkstückaufnahme zum Einbau in eine Messvorrichtung bereit gestellt, wobei die Werkstückaufnahme durch die kennzeichnenden Merkmale des entsprechenden Hauptanspruchs gekennzeichnet ist.In addition, according to the invention, a corresponding workpiece holder for installation in a measuring device is provided, wherein the workpiece holder is characterized by the characterizing features of the corresponding main claim.
Vorteilhafte Ausgestaltungen der erfindungsgemässen Messvorrichtung, respektive der entsprechenden Werkstückaufnahme, bilden die Gegenstände der abhängigen Ansprüche.Advantageous embodiments of the inventive measuring device, respectively the corresponding workpiece holder, form the subject of the dependent claims.
Ausführungsbeispiele der Erfindung werden im Folgenden unter Bezugnahme auf die Zeichnungen näher beschrieben. Es zeigen:
- FIG. 1
- eine schematische Darstellung einer bekannten Messvorrichtung;
- FIG. 2
- eine schematische Darstellung einer erfindungsgemäßen Werkstückaufnahme;
- FIG. 3
- eine schematische Darstellung einer weiteren erfindungsgemäßen Werkstückaufnahme;
- FIG. 4
- eine schematische Darstellung einer erfindungsgemäßen Messvorrichtung mit einer Werkstückaufnahme nach
Fig. 2 .
- FIG. 1
- a schematic representation of a known measuring device;
- FIG. 2
- a schematic representation of a workpiece holder according to the invention;
- FIG. 3
- a schematic representation of another workpiece holder according to the invention;
- FIG. 4
- a schematic representation of a measuring device according to the invention with a workpiece holder according to
Fig. 2 ,
Im Zusammenhang mit der vorliegenden Beschreibung werden Begriffe verwendet, die auch in einschlägigen Normen Verwendung finden. Es sei jedoch angemerkt, dass die Verwendung dieser Begriffe lediglich dem besseren Verständnis dienen soll. Der erfinderische Gedanke und der Schutzumfang der Patentansprüche sollen durch die spezifische Wahl der Begriffe nicht in der Auslegung eingeschränkt werden. Die Erfindung lässt sich ohne Weiteres auf andere Begriffssysteme und/oder Fachgebiete übertragen. In anderen Fachgebieten sind die Begriffe sinngemäss anzuwenden.In the context of the present description, terms are used which are also used in relevant standards. It should be noted, however, that the use of these terms is for the convenience of understanding only. The inventive idea and the scope of the claims should not be limited by the specific choice of the terms in the interpretation. The invention can be readily applied to other conceptual systems and / or fields. In other fields the terms are to be applied analogously.
Es geht, wie eingangs angedeutet, um das Messen von großen und schweren Werkstücken. Insbesondere geht es um das Messen von Drehwerkstücken (z.B. Wellen) oder Zahnräder. Die erfindungsgemäße Vorrichtung ist insbesondere geeignet für großmodulige Zahnräder, wie sie im Schiffsbau, in Kraftwerken und Industrieanlagen zum Einsatz kommen. Die im Folgenden beschriebenen Beispiele konzentrieren sich daher auf das Messen von Zahnrädern, wobei dies nicht als einschränkend für den Schutzumfang zu verstehen ist.It is, as indicated at the beginning, to the measurement of large and heavy workpieces. In particular, it is about measuring rotary workpieces (e.g., shafts) or gears. The device according to the invention is particularly suitable for large-modulus gears, as used in shipbuilding, power plants and industrial plants. The examples described below therefore focus on the measurement of gears, which is not to be understood as limiting the scope of protection.
Der Begriff "Messen" wird verwendet, um das Vermessen oder Ermitteln der Geometrie, der Lage oder anderer Aspekte eines Werkstücks zu beschreiben. Dieser Begriff soll ganz allgemein jede Art des Erfassens von Messgrößen mittels eines Tast-, Abtast- oder Scannkopfes umfassen, wobei es sich um z.B. mechanisch, optisch, kapazitiv und/oder induktiv arbeitende Taster handeln kann.The term "measuring" is used to describe the measurement or determination of the geometry, position or other aspects of a workpiece. This term is intended to broadly encompass any manner of sensing measurements by means of a scanning, scanning or scanning head, which may be e.g. can act mechanically, optically, capacitively and / or inductively operating push-button.
Bevor Details der Erfindung beschrieben werden, werden anhand der
Die Messvorrichtung 100 umfasst ein Maschinenbett, das im Folgenden allgemeiner als Grundplatte 3 bezeichnet wird. Bei der Grundplatte 3 handelt es sich um eine Art Trägerelement oder Rahmen (z.B. in Form eines Gussteils), das die wesentlichen Teile der Messvorrichtung 100 trägt. An der Grundplatte 3 kann ein vertikaler Messturm 16 mit einem Messtaster 14 vorgesehen sein (es können aber auch zwei Messtaster 14 vorgesehen sein). Der Messturm 16 kann z.B. in Y' Richtung entlang der Grundplatte 3 bewegt werden, um so den Abstand zu einem Werkstück 2 zu reduzieren, das zu messen ist. Der Messtaster 14 (in
Das Werkstück 2, im gezeigten Beispiel ein Zylinderrad mit Welle, ist senkrecht auf einem drehbaren Tisch, Drehtisch 1 genannt, gelagert. Vorzugsweise kommen ein unterer Spanndorn D1 und ein oberer Spanndorn D2 (auch Gegenspitze genannt) zum Einsatz, um das Werkstück 2 einspannen zu können. Es kann ein entsprechender seitlicher Arm 21 vorgesehen sein, um das Einspannen des Werkstücks 2 zu ermöglichen. Der Abstand zwischen den Spanndornen D1 und D2 kann eingestellt werden. Die Grundplatte 3 samt aller Aufbauten ruht mit mehreren Füssen 22 auf einem Fundament 12.The
In
Bei der gezeigten Ausführungsform gibt es keine mechanische Verbindung (daher die Bezeichnung vertikal frei schwimmend) zwischen dem Drehtisch 1 mit Unterbau und der Grundplatte 3. Lediglich die Reibungskräfte, die im Bereich des Radiallagers 5 auf die Welle W wirken, sorgen für eine geringe mechanische Kopplung der beiden Bereiche. Mit anderen Worten ausgedrückt, kann der Drehtisch 1 mit Unterbau nahezu unabhängig von der Grundplatte 3 nach oben oder unten bewegt werden, bzw. die Grundplatte 3 kann nach oben oder unten bewegt werden, ohne den Drehtisch 1 mit Unterbau mitzubewegen.In the embodiment shown, there is no mechanical connection (hence the term vertically floating) between the
Um nun die Messvorrichtung 100 als Gesamtes in seiner Lage zu definieren, kann die Grundplatte 3 z.B. mit entsprechenden Füssen 22 oder Blöcken auf dem Fundament 12 ruhen, wie z.B. in
Wenn nun z.B. ein schweres Werkstück 2 auf den Drehtisch 1 aufgespannt wird (z.B. zwischen zwei Spanndornen D1 und D2, wie in
Eine gegenwärtig bevorzugte Ausführungsform der Erfindung ist in
Um dies zu ermöglichen, sind folgende Bestandteile der Werkstückaufnahme vorgesehen (von oben nach unten betrachtet). Es ist ein Drehtisch 1 vorgesehen, wie in
Der Flansch 10 ist so konstruktiv ausgeführt, dass er als flexible Lagerung 18 dient. Dabei ist in Axialrichtung eine gewisse Flexibilität vorhanden. Diese Flexibilität ergibt sich bei der gezeigten Ausführungsform durch die dünnen und flexiblen (membranartigen) Stege 18.1. Durch diese Art der flexiblen Lagerung 18, die hier auch als schwebende Lagerung bezeichnet wird, wird sicher gestellt, dass ein Grossteil der Gewichtskräfte G direkt oder indirekt in das Fundament 12 eingeleitet werden. Nur ein vernachlässigbar kleiner Anteil der Gewichtskraft G wird über die Stege 18.1 in den unteren Bereich der Grundplatte 3 eingeleitet. Diese Kräfte sind jedoch so klein, dass es nicht zu einer Verbiegung oder sonstigen Beeinflussung der Grundplatte 3 oder des 3-D Messaufbaus (Messvorrichtung 100) kommt.The
Im Folgenden sind weitere vorteilhafte Details der in
Vorzugsweise ist das Axiallager 9 mittels einer Schraubverbindung (aus einer Schraube 19 mit einem Gewindeloch) mit dem unteren Stirnende 13 der Welle W verschraubt. Die Schraube 19 ist in einem Schraubenloch/Gewindeloch im unteren Endbereich 4 der Welle W befestigt.Preferably, the
Der erwähnte Fundamentschuh 11 kann an oder unterhalb der Grundplatte 3 sitzen und ruht flächig auf dem Fundament 12.The foot shoe mentioned 11 can sit on or below the
Eine erfindungsgemässe Werkstückaufnahme 20 zum Einbau in eine Messvorrichtung 100, z.B. einer Messvorrichtung 100 nach
In
Bei der in
Das beschriebene Verfahren eignet sich ganz besonders für das Messen von großmoduligen Zahnrädern, wie Stirnrädern, Kegelradritzeln und/oder Tellerrädern (vorzugsweise mit einem Modul größer als 12). Erfindungsgemäße Messzentren 100 sind besonders geeignet zum Prüfen von großen und schweren Stirnradverzahnungen sowie, Schnecken und Schneckenrädern, Kegelrädern und allg. Maß-, Form- und Lageabweichungen an rotationssymmetrischen Werkstücken und auch zur Rotormessung.The method described is particularly suitable for the measurement of large-modulus gears, such as spur gears, bevel gears and / or ring gears (preferably with a module greater than 12). Measuring centers 100 according to the invention are particularly suitable for testing large and heavy spur gears as well as, worms and worm wheels, bevel gears and general dimensional, shape and position deviations on rotationally symmetrical workpieces and also for rotor measurement.
Die erfindungsgemässe Vorrichtung 100 hat den Vorteil, dass beim Messen eines grossmoduligen Zahnrades kein großer Aufwand beim vorbereitenden Einrichten (Einspannen) oder beim Korrigieren oder Ausgleichen von Messungenauigkeiten erforderlich ist, die sich bei konventionellen Messvorrichtungen ergeben würden, wenn man schwere Werkstücke vermisst. Während dieser Zeit würde eine teuere Messvorrichtung still stehen, was aus finanzieller Sicht nachteilig ist.The
Zur Aufnahme der hohen Werkstückgewichte G ist die Werkstückaufnahme 20 besonders tragfähig und mit großen Reserven ausgelegt. Das zulässige Prüfgewicht kann deutlich über 1000 kg liegen. Je nach Ausgestaltung der Vorrichtung 100 können sogar Werkstückgewichte G von mehreren Tonnen (z.B. mehr als 10 Tonnen) gemessen werden.To accommodate the high workpiece weights G, the
Claims (17)
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE502007004028T DE502007004028D1 (en) | 2007-10-24 | 2007-10-24 | Measuring device for heavy workpieces |
EP07119171A EP2053345B1 (en) | 2007-10-24 | 2007-10-24 | Measuring device for heavy workpieces |
AT07119171T ATE470126T1 (en) | 2007-10-24 | 2007-10-24 | MEASURING DEVICE FOR HEAVY WORKPIECES |
US12/254,886 US7735233B2 (en) | 2007-10-24 | 2008-10-21 | Measuring apparatus for heavy workpieces and workpiece receiver for such a measuring apparatus |
JP2008271761A JP5537792B2 (en) | 2007-10-24 | 2008-10-22 | Measuring device for heavy workpiece and workpiece receiver for such measuring device |
CN2008101691529A CN101419067B (en) | 2007-10-24 | 2008-10-23 | Measuring device for heavy workpieces and receiver for such a measuring device |
Applications Claiming Priority (1)
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EP07119171A EP2053345B1 (en) | 2007-10-24 | 2007-10-24 | Measuring device for heavy workpieces |
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EP2053345A1 true EP2053345A1 (en) | 2009-04-29 |
EP2053345B1 EP2053345B1 (en) | 2010-06-02 |
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EP07119171A Not-in-force EP2053345B1 (en) | 2007-10-24 | 2007-10-24 | Measuring device for heavy workpieces |
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---|---|
US (1) | US7735233B2 (en) |
EP (1) | EP2053345B1 (en) |
JP (1) | JP5537792B2 (en) |
CN (1) | CN101419067B (en) |
AT (1) | ATE470126T1 (en) |
DE (1) | DE502007004028D1 (en) |
Cited By (2)
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DE102010037352A1 (en) * | 2010-09-06 | 2012-03-08 | Hexagon Metrology Gmbh | Holding device for work piece, comprises holder and arrester for clamping work piece, where holder is connected with rotary table in torque-proof manner, and arrester is arranged at fastener |
CN103447839A (en) * | 2013-08-22 | 2013-12-18 | 一重集团绍兴重型机床有限公司 | Closed hydrostatic workbench of heavy-duty vertical milling machine |
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EP2116325B1 (en) * | 2007-02-16 | 2012-02-01 | Makino Milling Machine Co. Ltd. | Machine tool |
CN101988826B (en) * | 2009-08-03 | 2012-06-27 | 中冶长天国际工程有限责任公司 | Centering device for installation and measurement |
CN102022990B (en) * | 2010-11-16 | 2012-05-30 | 陕西秦川机械发展股份有限公司 | Large gear measuring instrument |
CN102980755B (en) * | 2012-11-16 | 2015-05-20 | 北京工业大学 | Quantitive type experimental device for dynamic and static performances of static-pressure rotary table |
CN106092537B (en) * | 2016-06-15 | 2018-08-31 | 北京理工大学 | A kind of automobile-used rotatory sealing oil film dynamic rate characterisitic parameter test platform and method |
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2007
- 2007-10-24 AT AT07119171T patent/ATE470126T1/en active
- 2007-10-24 EP EP07119171A patent/EP2053345B1/en not_active Not-in-force
- 2007-10-24 DE DE502007004028T patent/DE502007004028D1/en active Active
-
2008
- 2008-10-21 US US12/254,886 patent/US7735233B2/en not_active Expired - Fee Related
- 2008-10-22 JP JP2008271761A patent/JP5537792B2/en not_active Expired - Fee Related
- 2008-10-23 CN CN2008101691529A patent/CN101419067B/en not_active Expired - Fee Related
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US2811781A (en) | 1951-10-17 | 1957-11-05 | Gleason Works | Checking device |
GB2008764A (en) * | 1977-11-16 | 1979-06-06 | Maag Zahnraeder & Maschinen Ag | Support of the work table of a gear testing machine |
DE9007815U1 (en) * | 1990-02-05 | 1997-02-13 | Heidenhain Gmbh Dr Johannes | Angle measuring table |
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DE102010037352A1 (en) * | 2010-09-06 | 2012-03-08 | Hexagon Metrology Gmbh | Holding device for work piece, comprises holder and arrester for clamping work piece, where holder is connected with rotary table in torque-proof manner, and arrester is arranged at fastener |
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CN103447839A (en) * | 2013-08-22 | 2013-12-18 | 一重集团绍兴重型机床有限公司 | Closed hydrostatic workbench of heavy-duty vertical milling machine |
Also Published As
Publication number | Publication date |
---|---|
CN101419067B (en) | 2011-06-08 |
DE502007004028D1 (en) | 2010-07-15 |
CN101419067A (en) | 2009-04-29 |
EP2053345B1 (en) | 2010-06-02 |
US20090112508A1 (en) | 2009-04-30 |
JP5537792B2 (en) | 2014-07-02 |
JP2009133835A (en) | 2009-06-18 |
US7735233B2 (en) | 2010-06-15 |
ATE470126T1 (en) | 2010-06-15 |
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